Module: ActiveRecord::Deltas

Included in:
Base
Defined in:
lib/ar-deltas.rb

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(klass) ⇒ Object 



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# File 'lib/ar-deltas.rb', line 4

def self.included(klass)
  klass.class_eval do
    alias_method_chain :attributes_with_quotes, :deltas
  end
end

Instance Method Details

#attributes_with_quotes_with_deltas(*args) ⇒ Object 



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# File 'lib/ar-deltas.rb', line 10

def attributes_with_quotes_with_deltas(*args)
  with_deltas = attributes_with_quotes_without_deltas(*args)
  return with_deltas if self.new_record?
  with_deltas.keys.each do |attribute_name|
    if self.class.delta_attributes.include?(attribute_name.intern) && !self.excluded_deltas.include?(attribute_name.intern)
      delta_string = "#{self.connection.quote_column_name(attribute_name)} "
      old_value, new_value = self.changes[attribute_name]
      delta_string << (old_value > new_value ? "-" : "+")
      delta_string << " #{(old_value - new_value).abs}"
      with_deltas[attribute_name] = delta_string
    end
  end
  with_deltas
end

#excluded_deltas ⇒ Object 



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# File 'lib/ar-deltas.rb', line 25

def excluded_deltas
  @_excluded_deltas ||= Set.new
end

#force_clobber(attr_name, value) ⇒ Object 



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# File 'lib/ar-deltas.rb', line 29

def force_clobber(attr_name, value)
  self.excluded_deltas.add(attr_name.to_s.intern)
  send("#{attr_name}=", value)
end